Table 7.

At Least One-Level Reduction in Frequency Level as a Predictor of 6- and 12- Month Outcomes

	6-Month Outcomes
	At Least One-Level Reduction in Frequency Level?
		NO (i.e., no change/increase in frequency level) n = 329	YES (i.e., reduced 1 or 2 frequency levels) n = 197
	B (SE)	Means (SD) or N (%)		Effect Size
ASI Cocaine	−.12 (.03)**	.39 (.30)	.25 (.26)	d=.49
ASI Other Drug Use	−.009 (.008)	.05 (.08)	.03 (.07)	d=.26
ASI Alcohol	−.004 (.01)	.05 (.12)	.07 (.13)	d=.15
ASI Medical	.01 (.01)	.09 (.22)	.09 (.21)	d=0
ASI Psychological	−.04 (.01)*	.17 (.21)	.12 (.17)	d=.26
ASI Family	−.01 (.01)	.10 (.16)	.09 (.13)	d=.06
ASI Employment	−.07 (.02)	.67 (.27)	.57 (.27)	d=.37
ASI Legal	−.04 (.008)**	.08 (.16)	.03 (.11)	d=.36
Cocaine Use Days	−.4.32 (.57)**	7.02 (8.77)	3.05 (5.7)	d=.53
Cocaine Negative Urine	.68 (.06)**	97 (34%)	95 (59.7%)	OR = 1.95
12-Month Outcomes
At Least One-Level Reduction in Frequency Level?
		NO n = 156	YES n = 145
ASI Cocaine	−.09 (.04)	.31 (.27)	.21 (.23)	d=.39
ASI Other Drug Use	−.01 (.003)*	.04 (.08)	.02 (.07)	d=.26
ASI Alcohol	.003 (.01)	.07 (.15)	.08 (.14)	d=.06
ASI Medical	.01 (.01)	.08 (.21)	.09 (.25)	d=.04
ASI Psychological	−.04 (.01)*	.14 (.20)	.09 (.15)	d=.28
ASI Family	.00 (.02)	.12 (.17)	.12 (.16)	d=0
ASI Employment	−.08 (.01)**	.63 (.26)	.55 (.24)	d=.31
ASI Legal	.003 (.02)	.04 (.11)	.05 (.13)	d=.08
Cocaine Use Days	−.2.02 (.32)**	5.4 (7.6)	3.4 (6.38)	d=.28
Cocaine Negative Urine	.26 (.10)	56 (43%)	59 (56.7%)	OR = 1.29

Note.

^*p≤0.01.

^**p≤0.001.

B = Unstandardized regression coefficient. SD = standard deviation. SE = standard error. d= Cohen’s d. OR = Odds Ratio. EOT = End of Treatment. ASI = Addiction Severity Index. In all models, we controlled for age, gender, race, education status, and baseline cocaine frequency level. For all models with ASI composites as the outcome, we also controlled for the baseline value of the ASI outcome.